Isopropyl alcohol contains C, H and O. When 0,255g of isopropyl alcohol is combusted it produces 0,561g of CO2 and 0,306g of H2O, what is the empirical formula of isopropyl alcohol?

The correct answer is b

The answer is the third choice

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).

Burned piece of steel wool does not gain mass. so only d could be true.